Liquid-pressure generator



(No Model.) 2 sheets-sheet 1. H. J. SMALL L'J. MGNAG'HTN.

LIQUID PRESSURE GENERATOR.

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(No Model.) l 2 Sheets-Sheet 2. Hi JJSMALL &.J. MGNAUGHTON.

LIQUID PRESSURE GENERATOR.

f75:554/5/,55554554rfi UNITED STATES PATENT jErica HENRY J. SMALL AND JAMES MONAUGHTON, OF BRAINERD, MINNESOTA.

LIQUID-PRESSUREl GENERATOR.

SPECIFICATION forming part of Letters Patent No. 347,897, dated August 24, 1886.

Application tiled Ot toller 26, 18H5. Serial No. 180,919.

To alf whom if may concern.-

Be it known that we, HENRY J. SMALL and J AMEs MoNAUGu'roN, citizens of the United States, and residents of Brainerd, inthe county of Crow Wing` and State of'Minnesota, have invented certain Improvements in Liquid- Pressure Generators, of which the following is a specification.

Our invention relates to a device designed to generate a liquid-pressure, and by such pressure to operate an instrument, such as a speed-indicator or a steam-governor- Ourinvention consists, generally, in the construction and combination hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure l is a vertical section of one of our devices applied to a speedindicator. Fig. 2 is asimilar view of the same device applied as a steam-governor. Fig. 3 is a detail View` of the plate U.

In the drawings, L represents asuitable cylinder,whieh is here shown arranged vertically; but it may be placed horizontally or in any other suitable position. One end of the cylinder-as here shown the upper-,A-is closed by suitable means, as a screw-cap. Vithin this cylinder isa worm, K, upon a shaft, Q` that at one end is centered and revolved upon a bearing, J. The worm iits closely the inside of the cylinder, and itsk shaft extends through a base-plate, N, stuffing-box O, gland X, and nut P, and is connected by gears It It and shaft W, or other suitable gearing, with a suitable friction-wheel, S.

M is a Iiange projecting from the base-plate N, and receiving the end of the cylinder L. Beneath the end of the cylinder, within the flange M, is a plate, U, which closes the end of the cylinder, and has holesV through it, to permit the liquidto pass th rough. These holes are preferably formed diagonally through the plate, as shown, for a purpose hereinafter stated.

Y is an outer easing surrounding the cylinder L and secured to thebase N. In the flange M are a number of holes, M', through which the liquid passes into the outer casing, Y. Secured to or formed upon the shaft Q, beneath the plate U, is a conical disk, Q', which prevents leakage of the liquid around the shaft Q, and

(No model.)

by its conical shape directs the liquid out through the holes l with the least possible resistance from friction. rl`he diagonal direction of the holes V also aids in directing the liquid through the openings M. The upper end of the casing Y is closed by a plate, H, which is preferably formed with a tube or chambenG, having therein a movable plate,E.

As shown in Fig. l, the plate E is formed as a flexible diaphragm; but as an equivalent therefor we propose to use other devices, as a piston or sliding plate or disk, that will move Within the chamber without permitting t-he liquid to pass. Above the diaphragm isan ordinary indicator, A B, whose operating-rod C is in connect-ion with the diaphragm. /Ve prefer to provide also a surplus liquid reservoir, D F, which may be located above the cas` ing Y, surrounding the chamber G, and connected with the upper end of the cylinder by suitable tubes, I l. e

When used to operate a speedindicator, the device is preferablyl arranged, as shown in Fig. 1, with the friction-wheel bearing upon the tire of a locomotive, car,` or other vehicle wheel, T. The cylinder, the surplusliquid reservoir, when used, and the casing and chamber G, up to the movable plate or diaphragm, are filled with liquid. The rotation of the worm in the cylindertends to move the liquid out ofthe cylinder, and thereby creates a pressure that is transmitted to and-moves the diaphragm or plate in the chamber G. The greater the speed of the wheel against which thefriction-wheel bears the faster the wormshaft will revolve and the greater the pressure of the liquid on themovable part. rIhe indicator, being properly spaced and marked, will show at a glance the speed at which the train or vehicle is running.

The surplus-liquid reservoir is not essential to the operation of the device, but is used to make up for any leakage of liquid that may occur.

The casing Y is used principally to protect the cylinder, and it is obvious that any other suitable connection may be made between the cylinder and diaphragm.

The surplus-liquid reservoir and the diaphragm and indicator maybe located at some distance from the cylinder, with suitable pipes for connection between them and the cylinder.

IOO

The surplus-liquid reservoir and the outer casing may be both omitted, if desired.

In Fig. 2 We have shown the same device applied to control a steam-valve. As here shown, the movable part in the chamber G is connected through a lever, 2, pivoted at l, and levers/4 and 5 with asteam-valve, 7, in apipe, 6. The friction-wheel is applied to a shaft, 8. The valve Will be controlled by the speed of the worm-shaft. It isobvious that the device may also be applied to other tools or mechanisms, and other applications of the same will suggest themselves to skilled mechanics.

worm-shaft K, fitting therein, and means for revolving said shaft, of the chamber G, a movable plate therein, means connecting said chamber with said cylinder, thesurplus-liquid reservoir F, and the tubes I I', extending from said reservoir into said cylinder, all substantially as described.

3. The combination, with the cylinder L, worm-shaft K, and means for revolving said shaft, of the chamber G, the movable plate therein, casing Y, plate U, having diagonal holes V, and the conical disk Q', all substantially as and for the purpose set forth.

4. The combination, with the cylinder L and revolving worm-shaft K, of the plate U, having the diagonal holes V, the outer casing, Y, conical disk Q', surplusliquid reservoir F, the tube G, and diaphragm E, allsubstantially as described, and for the purpose set forth.

In testimony whereof we have hereunto set ou rhandsthis 21st day of October, A. D. 1885.

HENRY J. SMALL. JAMES MCNAUGHTON. 

